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What is Pterygium and Pinguecula ?

[Extracted from the webpage of www.healthscout.com] A pterygium is a fleshy growth that invades the cornea (the clear front window of the eye). It is an abnormal process in which the conjunctiva (a membrane that covers the white of the eye) grows into the cornea. A pinguecula is a yellowish patch or bump on the white of the eye, most often on the side closest to the nose. It is not a tumor but an alteration of normal tissue resulting in a deposit of protein and fat. Unlike a pterygium, a pinguecula does not actually grow onto the cornea. A pinguecula may also be a response to chronic eye irritation or sunlight. Although pterygium and pinguecula sound like mysterious, arcane diseases, they are actually quite common, usually benign eye conditions. These lesions appear as a whitish-yellowish bump or fleshy "growth" on the exposed conjunctiva. If the bump appears only on the white part of the eye, it is called a pinguecula. If it appears to "grow" onto t

Benefits of Sweet Potatoes, including the Purple-colored variety

[Extracted from the webpages of hubpages.com & whfoods.com] Sweet potatoes are called in various names. Batata, boniato, and camote in Spain and Mexico; kumar in Peru; kumara in the Polynesian Islands, including New Zealand; cilera abana (protector of the children) in Eastern Africa; ubhatata in South Africa; and kara-imo and satsuma-imo in Japan. In China alone, sweet potatoes are called different names in different parts of China. Sweet potatoes are supposed to be native to Central America, but as far as I know, the Chinese have been eating sweet potatoes a very long time ago. In China and Japan, baked and steamed sweet potatoes are popularly sold as street food. Orange-fleshed sweet potatoes may be one of nature's unsurpassed sources of beta-carotene. Several recent studies have shown the superior ability of sweet potatoes to raise our blood levels of vitamin A. This benefit may be particularly true for children. In several studies from Africa, sweet potatoes w